Strengthening and corrosion protection of coastal transportation infrastructure with titanium alloy bars

Strengthening reinforced concrete structures using the near-surface mounded retrofit (NSMR) technique is an established approach in structural engineering practice. Besides conventional fiber reinforced polymer-based retrofitting materials, in recent years, Grade 5 titanium alloy bars (TiABs) have been shown to effectively and economically increase shear and flexural strength of existing reinforced concrete structures. Mix metal oxides (MMO) coated Grade 1 or 2 titanium is a widely used anode in impressed current cathodic protection (ICCP) systems to mitigate reinforcement corrosion issues in existing structures. Grade 5 TiAB bars, even though they are not designed specifically to be used ICCP applications, have also been shown in preliminary studies to work as ICCP anodes. Integrating NSRM and ICCP applications provides a unique opportunity for a multi-functional (dual-purpose) solution that can provide immediate capacity restoration and mitigate future reinforcement corrosion issues in existing structures. However, the lack of surface coating might have implications with respect to their ICCP performance and durability, which requires further investigation. To address this gap, this project investigates the role of MMO coating of TiAB bas on their ICCP performance. The project involves benchtop scale electrochemical studies to investigate the role of MMO in maintaining a stable and long-term impressed current. The performance of these systems is further investigated when the MMO coated bars are embedded in cementitious systems as ICCP anodes. The results are compared against MMO-coated Grade 1/2 ICCP anodes and bare TiAB.

Language

• English

Project

• Status: Active
• Funding: $1114444
• Contract Numbers:

  69A3552348330

• Sponsor Organizations:

  Coastal Research and Transportation Education (CREATE)

  Texas State University
  San Marcos, TX  United States  77666

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590

  Oregon State University, Corvallis

  Department of Civil Engineering
  202 Apperson Hall
  Corvallis, OR  United States  97331-2302
• Managing Organizations:

  Coastal Research and Transportation Education (CREATE)

  Texas State University
  San Marcos, TX  United States  77666
• Project Managers:

  Bruner, Britain

  Kulesza, Stacey

• Performing Organizations:

  Oregon State University, Corvallis

  Department of Civil Engineering
  202 Apperson Hall
  Corvallis, OR  United States  97331-2302
• Principal Investigators:

  Isgor, O

  Higgins, Christopher

• Start Date: 20240930
• Expected Completion Date: 20250901
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Anodes; Cathodic protection; Coastal engineering; Metal fibers; Oxides; Reinforced concrete; Retrofitting
• Subject Areas: Bridges and other structures; Maintenance and Preservation; Materials; Terminals and Facilities;

Filing Info

• Accession Number: 01932894
• Record Type: Research project
• Source Agency: Coastal Research and Transportation Education (CREATE)
• Contract Numbers: 69A3552348330
• Files: UTC, RIP
• Created Date: Oct 7 2024 3:52PM